Diversity of freshwater molluscs (Gastropoda, Bivalvia) of the Krka National Park

Vučković, Natalija (2013) Diversity of freshwater molluscs (Gastropoda, Bivalvia) of the Krka National Park. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

The goal of this study was to determine composition of freshwater mollusc assemblages in the River Krka and to define their density, size classes and functional feeding guilds at the area of Roški slap and Skradinski buk. In total, 21 species of snails and 8 species of mussels were found during investigation of Krka River. At most of the localities snail species Bithynia tentaculata and Stagnicola fuscus were found, while the most common species of bivalves were Anodonta anatina and Unio mancus. Very important was finding of Anisus vorticulus which is very rare and nationally protected species. The most abundant species at waterfalls was B. tentaculata which had density of 3312 ind./m2 at locality Skradinski buk 1. The analysis of size classes indicated that younger individuals prevailed at microhabitats with higher flow velocities while adult individuals were dominant in slower currents. Dominant functional feeding guild at Skradinski buk were detritivores but grazers and active filtrators were also present in significant numbers. At Roški slap, grazers were dominant while active filtrators and detritivores were present in lesser numbers.

Item Type: Thesis (Diploma thesis)
Keywords: molluscs, river Krka, population density, growth structure, functional feeding guilds
Supervisor: Lajtner, Jasna
Date: 2013
Number of Pages: 73
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 26 Sep 2014 10:39
Last Modified: 26 Sep 2014 10:39
URI: http://digre.pmf.unizg.hr/id/eprint/2837

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